Final answer:
Native Americans reacted to European policies by resisting the changing world brought by colonization, primarily through conflicts over land ownership and restrictions on their freedom of movement.
Step-by-step explanation:
One reaction of Native Americans to European policies was their resistance to the changing world brought by European colonization. Native tribes often clashed with European settlers over land ownership and faced conflicts due to restrictions on their freedom of movement. The introduction of European commodities and weapons also brought significant changes to their way of life.